Definition of periapsis in English:

periapsis

Line breaks: peri|apsis
Pronunciation: /ˌpɛrɪˈapsɪs
 
/

noun (plural periapses /-siːz/)

Astronomy
The point in the path of an orbiting body at which it is nearest to the body that it orbits.
More example sentences
  • For objects orbiting Earth, periapsis and apoapsis are known as perigee and apogee; for objects orbiting the Sun, these locations are known as perihelion and aphelion.
  • At periapsis [closest approach to Saturn] it's about 40 kilometers per second [90,000 miles per hour].

Definition of periapsis in:

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day oleaginous
Pronunciation: ˌōlēˈajənəs
adjective
rich in, covered with, or producing oil; oily